Experimental Investigations of 3D Woven Layer to-Layer Carbon/Epoxy Composites at Different Strain Rates

This paper reports experimental investigations of 3D woven carbon/epoxy composites on quasi-static and dynamic tensile properties in the longitudinal (warp) and transverse (weft) directions. Firstly, quasi-static tests were conducted to determine a baseline tensile strength and to find out the adequ...

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Bibliographic Details
Published in:EPJ Web of conferences 2021, Vol.250, p.1029
Main Authors: Yoo, Sanghyun, Dahale, Monali, Neale, Geoffrey, Toso, Nathalie, Catalanotti, Giuseppe, McIlhagger, Alistair, Archer, Edward, Harkin-Jones, Eileen, Voggenreiter, Heinz
Format: Article
Language:English
Subjects:
Carbon-epoxy composites
Computed tomography
Crack initiation
Digital imaging
Dynamic tests
Failure mechanisms
Specimen geometry
Static tests
Strain rate
Tensile properties
Tensile strength
Three dimensional composites
Warp
Weft
Woven composites
Yarns
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Summary:This paper reports experimental investigations of 3D woven carbon/epoxy composites on quasi-static and dynamic tensile properties in the longitudinal (warp) and transverse (weft) directions. Firstly, quasi-static tests were conducted to determine a baseline tensile strength and to find out the adequate specimen geometry required for dynamic testing. Secondly, dynamic tensile properties at intermediate strain rates (nominal strain rates from 0.1 to 200 s -1 ) were investigated alongside the corresponding failure mechanisms. Detailed information on failure patterns is obtained with strain field measurements from Digital Image Correlation (DIC) and CT scans. The results show that 3D woven composites are strain rate insensitive and the crack initiation is located near weft yarns and binding interlacement points due to the presence of resin rich areas.
ISSN:2100-014X
2101-6275
2100-014X
DOI:10.1051/epjconf/202125001029